- Melanie WardLabourMP for Cowdenbeath and KirkcaldyMP since 2024
- Baroness WarsiNon-affiliatedMember of the House of LordsPeer since 2007
- Baroness Warwick of UndercliffeLabourMember of the House of LordsPeer since 1999
- Lord WassermanNon-affiliatedMember of the House of LordsPeer since 2011
- Baroness Watkins of TavistockCrossbenchMember of the House of LordsPeer since 2015
- Lord Watson of InvergowrieLabourMember of the House of LordsPeer since 1997
- Lord Watson of Wyre ForestLabourMember of the House of LordsPeer since 2022
- Lord WattsLabourMember of the House of LordsPeer since 2015
- Paul WaughLabourMP for RochdaleMP since 2024
- Chris WebbLabourMP for Blackpool SouthMP since 2024
- Lord WeiConservativeMember of the House of LordsPeer since 2010
- Lord Weir of BallyholmeDemocratic Unionist PartyMember of the House of LordsPeer since 2022
- Michelle WelshLabourMP for Sherwood ForestMP since 2024
- Lord West of SpitheadLabourMember of the House of LordsPeer since 2007
- Catherine WestLabourMP for Hornsey and Friern BarnetMP since 2015
- Andrew WesternLabourMP for Stretford and UrmstonMP since 2022
- Matt WesternLabourMP for Warwick and LeamingtonMP since 2017
- Lord Wharton of YarmConservativeMember of the House of LordsPeer since 2020
- Helen WhatelyConservativeMP for Faversham and Mid KentMP since 2015
- Baroness WheatcroftCrossbenchMember of the House of LordsPeer since 2010
- Baroness WheelerLabourMember of the House of LordsPeer since 2010
- Michael WheelerLabourMP for Worsley and EcclesMP since 2024
- Baroness WhitakerLabourMember of the House of LordsPeer since 1999
- John WhitbyLabourMP for Derbyshire DalesMP since 2024
- Lord WhitbyConservativeMember of the House of LordsPeer since 2013
- Baroness White of Tufnell ParkCrossbenchMember of the House of LordsPeer since 2025
- Jo WhiteLabourMP for BassetlawMP since 2024
- Katie WhiteLabourMP for Leeds North WestMP since 2024
- Lord WhiteheadLabourMember of the House of LordsPeer since 2025
- Sir John WhittingdaleConservativeMP for MaldonMP since 1992
- Nadia WhittomeLabourMP for Nottingham EastMP since 2019
- Lord WhittyLabourMember of the House of LordsPeer since 1996
Source: parliament.uk · 1,424 currently sitting · Open Government Licence v3.0